The interaction dynamics are modeled as an activity-driven temporal network that is fully encoded by the network connectivity parameters \((\varepsilon , \gamma , m, \beta )\) . Together with the issue parameters (\(K, \alpha \) ), the network of agents tends to a transient polarization and forms echo chambers. For controversial issues with strong proponents on either side, the network eventually goes into a radicalized state. The critical controversialness \(\alpha _c \simeq ((1+r) \cdot K \cdot m \cdot \langle \alpha \rangle )^{-1}\)  is the transition value above which a network will be polarized or radicalized [1]} .
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